Do you play poker?
When you're dealt only 5 cards there's only so many combinations possible and very few times are you going to find yourself with a straight flush, four of a kind or anything desirable.
The participants at the HZ have a certain parameter for discourse and many of the threads started, like poker hands dealt, will look very familiar even if they are not identical.
And if indeed they do start exceeding the parameters of normalcy, someone is surely bound to start complaining about those threads too.
C'est la HZ
;-)